The 1977–78 Portland Trail Blazers season was the eighth season of the Portland Trail Blazers in the National Basketball Association (NBA). Fresh off their first NBA Championship win the previous season, the Blazers led the league with a franchise-best 58–24 record, earning a first-round bye in the 1978 NBA Playoffs. However, they were defeated by the eventual Western Conference champion Seattle SuperSonics four games to two.

The 1976–77 season was the Portland Trail Blazers' 7th season in the National Basketball Association (NBA). The revamped Blazers would end up getting off to a terrific start winning 22 of their first 31 games. The Blazers won their last 5 games to post a record of 49–33. The Blazers made the playoffs for the first time in franchise history and proceeded to stampede through the postseason. By the time the Blazers had made it to the 1977 NBA Finals, the city of Portland was truly in the grips of "Blazermania". After losing the first two games of the championship series at Philadelphia, the Trail Blazers won four in a row to bring the trophy to Portland. The championship capped the team's first winning season. The Blazers had a remarkable 45–6 record at home, which included a perfect 10–0 mark in the playoffs.